90612593 has 4 divisors (see below), whose sum is σ = 93061620. Its totient is φ = 88163568.

The previous prime is 90612551. The next prime is 90612607. The reversal of 90612593 is 39521609.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52519009 + 38093584 = 7247^2 + 6172^2 .

It is a cyclic number.

It is not a de Polignac number, because 90612593 - 2¹⁰ = 90611569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90612523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224458 + ... + 1224531.

It is an arithmetic number, because the mean of its divisors is an integer number (23265405).

Almost surely, 2^90612593 is an apocalyptic number.

It is an amenable number.

90612593 is a deficient number, since it is larger than the sum of its proper divisors (2449027).

90612593 is a wasteful number, since it uses less digits than its factorization.

90612593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449026.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 90612593 is about 9519.0647124599. The cubic root of 90612593 is about 449.1549457547.

The spelling of 90612593 in words is "ninety million, six hundred twelve thousand, five hundred ninety-three".